Construction technology of composite wall with split bolts arranged in disassembly-free outer formwork

Abstract

The invention provides a construction technology for a composite wall with split bolts arranged in a disassembly-free outer formwork, and belongs to the technical field of thermal insulation wall construction. The construction technology comprises the following steps that S1, a composite thermal insulation board is prefabricated, and split bolt holes are reserved in the composite thermal insulation board; s2, a steel bar frame is bound, a composite insulation board and an inner wall formwork are vertically arranged, and holes are formed in the inner wall formwork; s3, a non-dismantling opposite-pull rod is connected with a built-in clamping plate and penetrates between the composite heat preservation plate and the inner wall formwork, the two ends of the non-dismantling opposite-pull rod are connected with nuts, a formwork supporting system is erected on the outer side of the composite heat preservation plate and the outer side of the inner wall formwork, and the two nuts are sleeved with clamping pieces to achieve centering and clamping; s4, concrete is poured between the composite insulation board and the inner wall formwork; and S5, an inner wall formwork and the like are dismantled, and the dismantling-free opposite pull rods are left in the composite heat preservation plate and the concrete. The assembly plays a role of a split bolt and a later-stage outer formwork connecting piece at the same time, and meanwhile the problems of the cold and hot bridge effect, the water seepage stubborn disease of a traditional split bolt hole and the like can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal insulation wall construction, and specifically relates to a composite wall construction process with built-in tension bolts and free from dismantling of external formwork. Background Art

[0002] In the existing exterior wall insulation cast-in-place concrete construction system, the insulation board and the exterior wall formwork are fixed by tension bolts, and then concrete is poured between the exterior formwork and the insulation board. After the concrete solidifies, the tension bolts and the exterior wall formwork are removed to form the concrete and the insulation board into one. It has the advantages of firm fixation, long service life, and short construction period.

[0003] In this construction system, as described in a construction method for sealing tension bolt holes in an integrated insulation wall with patent application number 202311805126.1, the bolt holes need to be sealed after the tension bolts are removed. Conventional processes use concrete and foam glue for sealing, but the sealing effect is poor and leakage is prone to occur. Using the above-mentioned construction method to seal the bolt holes is rather cumbersome, affecting the overall construction time.

[0004] Based on this, the construction technology of composite wall with built-in tension bolts without dismantling the external formwork was studied to avoid problems such as hot and cold bridge effect and stubborn water seepage, and it can also save a lot of construction time for cleaning and filling holes. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, a composite wall construction process with built-in tension bolts and no need to dismantle the external formwork is provided.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] This technical solution proposes a composite wall construction process with built-in tension bolts without dismantling the external formwork, including the following steps:

[0008] S1: prefabricated composite insulation board, during the prefabrication process, the composite insulation board is subjected to anti-bending treatment, and a number of groups of tension bolt holes are reserved after the composite insulation board is prefabricated;

[0009] S2: Tie up the steel bar frame, erect the formed composite insulation board and inner wall formwork on both sides of the steel bar frame, and make holes on the inner wall formwork to match and align with the tension bolt holes;

[0010] S3: inserting a plurality of groups of non-removable tie rods between the composite insulation board and the inner wall formwork, connecting one end of the non-removable tie rods located in the composite insulation board to the built-in clamping plate, connecting removable nuts at both ends of the non-removable tie rods, wherein one nut portion is placed between the non-removable tie rods and the built-in clamping plate, supporting a formwork support system on the outer sides of the composite insulation board and the inner wall formwork, sleeve clamping pieces on the two nuts, and then positioning the clamping pieces to achieve centering clamping;

[0011] S4: pouring concrete between the composite insulation board and the inner wall formwork;

[0012] S5: After the concrete is formed, the clamping parts, formwork support system, nuts and inner wall formwork are removed in sequence, and the non-removable tie rods and built-in card parts are left in the composite insulation board and the cast concrete.

[0013] Preferably, the composite thermal insulation board is composed of a plurality of groups of thermal insulation core materials which are arranged in a staggered manner and spliced ​​together, with seams being left between the thermal insulation core materials, and pre-embedded perforated anti-bending parts being arranged between the seams.

[0014] Preferably, the embedded perforated anti-bend part includes an embedded tube placed in the joint, the tension bolt hole is formed inside the embedded tube, both ends of the embedded tube are respectively connected to abutment plates, both sides of the abutment plates are respectively connected to bosses, and one of the abutment plates is detachably connected to the embedded tube.

[0015] Preferably, the prefabrication steps of the composite insulation board are as follows: place one of the abutment plates and the embedded tube fixed on it on the reserved position of the bottom support plate, lay the first layer of alkali-resistant mesh cloth, spread the insulation slurry, lay the second layer of alkali-resistant mesh cloth and evenly press it into the insulation slurry, staggeredly lay the insulation core material on top of the layer of insulation slurry to avoid the phenomenon of through seams, so that the embedded tube is located between the joints of the insulation core material, install the upper bottom plate on the embedded tube, lay the third layer of alkali-resistant mesh cloth, spread the insulation slurry, and evenly press the fourth layer of mesh cloth into the insulation slurry. After the insulation slurry is formed, the abutment plate and the boss are hidden inside the insulation slurry, leaving only the tension bolt holes in the embedded tube.

[0016] Preferably, the heights of the upper and lower layers of thermal insulation slurry of the thermal insulation core material are 12.5 mm respectively, and the height of the thermal insulation core material is 15 mm.

[0017] Preferably, in S3, both ends of the non-disassembly tie rod have external threaded sections, and the built-in clamping plate includes an internal cylinder threadedly connected to one of the external threaded sections, the outer end of the internal cylinder is fixedly connected to a support plate, and the support plate is placed on the outside of the composite insulation board.

[0018] Preferably, in S3, the nut includes a cylinder body, the cylinder body has an internal thread section which can be threadedly connected to the end of the non-disassembly tie rod, the outer end of the cylinder is fixed with a plug post, a pin hole is opened on the plug post, and the clamping piece is sleeved on the nut and the clamping piece is positioned by inserting a pin sheet into the pin hole.

[0019] Preferably, the inner cylinder and the cylinder body are both of truncated cone-shaped structure, and the cylinder body is threadedly connected with the non-disassembly tie rod and fits inside one of the inner cylinders.

[0020] Preferably, the clamping member includes a connecting portion, and the upper and lower ends of the connecting portion are respectively connected to arc-shaped arms, and the formwork support system is respectively placed in the two arc-shaped arms.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention reserves holes for tension bolts in the process of prefabricating the composite insulation board, thereby reducing subsequent on-site drilling and other processes. After the interior wall formwork and the composite insulation board are erected, a non-disassembly tension rod is inserted into the reserved hole, and then nuts, a formwork support system, clamping parts, etc. are connected to both ends of the non-disassembly tension rod to achieve tension and clamping of the composite board and the interior wall formwork support. Then, concrete is poured between the two. After the concrete is formed, the above components are removed, and the non-disassembly tension rod is left inside, eliminating the step of cleaning and filling the holes, saving a lot of construction time, so that the assembly can play the role of both the early tension bolt and the later external formwork connector, and at the same time, it can also avoid the hot and cold bridge effect and the stubborn problem of water seepage in traditional tension bolt holes.

[0023] 2. In the process of prefabricating the composite insulation board, the present invention arranges the insulation core materials in a staggered manner to avoid the occurrence of through seams, and the overall anti-bending ability is stronger. Pre-embedded perforated anti-bending parts are arranged between the seams of the insulation core materials to achieve stability and tightness between adjacent insulation core materials, so that it has stronger seismic resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a structural schematic diagram of the construction step S2 of the present invention.

[0026] Figure 2 It is a structural schematic diagram of construction step S4 of the present invention.

[0027] Figure 3 yes Figure 2 Enlarged view of part A.

[0028] Figure 4 It is a schematic diagram of the internal structure during the prefabrication process of the composite insulation board.

[0029] Figure 5 It is a schematic diagram of the arrangement of the thermal insulation core material and the pre-embedded perforated anti-bend parts.

[0030] Figure 6 It is a schematic diagram of the structure of the composite thermal insulation board after molding in the present invention.

[0031] Figure 7 It is a three-dimensional structural schematic diagram of the non-disassembly tie rod, nut and clamping member in the present invention.

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the pre-embedded perforated anti-bending member in the present invention.

[0033] Description of reference numerals:

[0034] 1. Composite insulation board; 101. Insulation core material; 102. Jointing; 103. First layer of alkali-resistant mesh cloth; 104. Insulation slurry; 105. Second layer of alkali-resistant mesh cloth; 106. Third layer of alkali-resistant mesh cloth; 107. Fourth layer of alkali-resistant mesh cloth; 108. Bottom support plate;

[0035] 2. Tie bolt holes; 3. Steel bar frame; 4. Internal wall formwork; 5. No need to dismantle the tie rods;

[0036] 6. Pre-buried perforated anti-bending part; 61. Pre-buried tube; 62. Abutment plate; 63. Boss; 64. Slurry hole; 65. Clamp ring; 66. Clamp groove;

[0037] 7. Built-in card plate; 71. Built-in cylinder; 72. Support plate;

[0038] 8. Nut; 81. Cylinder; 82. Plug; 83. Pin hole;

[0039] 9. Square timber; 10. Clamps; 11. Concrete; 12. Pins. DETAILED DESCRIPTION

[0040] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it is to be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally disposed component. When a component is considered to be "disposed on" another component, it may be directly disposed on the other component or there may be a centrally disposed component.

[0042] In addition, terms such as "long", "short", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific direction or operate with a specific direction structure, and should not be understood as a limitation of the present invention.

[0043] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings.

[0044] like Figure 1-8 As shown, this embodiment proposes a composite wall construction process with built-in tension bolts without disassembly of the external formwork, which includes the following steps:

[0045] S1: prefabricate the composite insulation board 1, during the prefabrication process, the composite insulation board 1 is subjected to anti-bending treatment, and a plurality of groups of tension bolt holes 102 are reserved after the composite insulation board 1 is prefabricated;

[0046] S2: Tie up the steel frame 3 and place the positioning blocks, erect the formed composite insulation board 1 and the inner wall formwork 4 on both sides of the steel frame 3, and make holes on the inner wall formwork 4 to match and align with the tension bolt holes 102;

[0047] S3: insert several groups of non-removable tie rods 5 from the outside into between the composite insulation board 1 and the inner wall formwork 4, connect one end of the non-removable tie rod 5 located in the composite insulation board 1 to the built-in cardboard 7, connect detachable nuts 8 to both ends of the non-removable tie rod 5, wherein one nut 8 is partially placed between the non-removable tie rod 5 and the built-in cardboard 7, and support a formwork support system on the outside of the composite insulation board 1 and the inner wall formwork 4. The formwork support system is several groups of square woods 9 arranged vertically and horizontally, and clamping pieces 10 are sleeved on the two nuts 8, and then the clamping pieces 10 are positioned to achieve centering clamping;

[0048] S4: pouring concrete 11 between the composite insulation board 1 and the inner wall formwork 4;

[0049] S5: After the concrete 11 is formed, the clamping parts 10, the formwork support system, the nuts 8 and the inner wall formwork 4 are removed in sequence, and the non-removable tie rods 5 and the built-in cardboard parts 7 are left in the composite insulation board 1 and the cast concrete 11.

[0050] In the actual construction process, the prefabricated composite insulation board 1 is provided with reserved tension bolt holes 102 for subsequent construction, which avoids the problem of damage to the composite insulation board 1 caused by drilling again, and the on-site drilling also requires marking and positioning, and the precise drilling position is quite inconvenient; in the subsequent construction, the non-disassembly tension rod 5 is inserted into the composite insulation board 1, and the built-in card plate 7 is installed at one end of the non-disassembly tension rod 5, which eliminates the step of subsequent drilling and installation of anchor bolts, avoids secondary damage to the composite insulation board 1, and can also play the role of anchor bolts, then installs the nut 8, supports the square wood 9 on the outside of the composite insulation board 1 and the inner wall formwork 4, and sets the clamping piece 10 The square wood 9 is centered and tightened on the nut 8 to facilitate the subsequent pouring of concrete 11; after the concrete 11 is poured and formed, only the clamping parts 10, square wood 9, nut 8 and inner wall formwork 4 are taken out, and the non-disassembly tie rod 5 and the built-in card plate 7 are left in the composite insulation board 1. Compared with the prior art that realizes the tension between the composite insulation board 1 and the inner wall formwork 4 by means of tie screws, after the tension pouring is completed, all the tie bolts and other components are removed and the holes are filled with grout, the use of pre-buried non-disassembly tie rod 5 can save a lot of construction processes, and can also avoid the cold and hot bridge effect and the stubborn problem of water seepage in the traditional tie bolt holes. After actual construction comparison, it has been greatly improved in the construction process and after forming compared with the construction method of the prior art, saving overall construction time and better quality.

[0051] In some embodiments, the composite panel is composed of several groups of thermal insulation core materials 101 that are arranged and assembled in a staggered manner, with joints 102 left between the thermal insulation core materials 101, and pre-embedded perforated anti-folding parts 6 and thermal insulation slurry 104 arranged between the joints 102; through this design, the gaps between adjacent thermal insulation core materials 101 are staggered, further improving the overall anti-folding strength of the core material arrangement structure, enhancing the stability and tightness of the core material arrangement structure, and making it have stronger seismic resistance, and pre-embedded perforated anti-folding parts 6 are arranged between the joints 102 to tighten the positioning of adjacent thermal insulation core materials 101, further enhancing the overall anti-folding ability.

[0052] In some embodiments, the embedded perforated anti-bending member 6 includes an embedded tube 61 placed in the joint 102, the embedded tube 61 has the above-mentioned tension bolt hole 102 formed inside, the two ends of the embedded tube 61 are respectively connected to the bottom plate, the two sides of the abutment plate 62 are respectively connected to the boss 63, the boss 63 is an isosceles trapezoidal structure, a plurality of groups of slurry holes 64 are provided on the boss 63 and the abutment plate 62, and a plurality of groups of barbs are provided on the upper end of the boss 63, one of the abutment plates 62 is detachably connected to the embedded tube 61, specifically, a clamping ring 65 is fixed at one end of the embedded tube 61, a clamping groove 66 is provided in one of the abutment plates 62, and the clamping ring 65 is adapted to be clamped and fixed to the clamping groove 66. The positioning of adjacent thermal insulation core materials 101 is achieved by clamping the thermal insulation core material 101 between the two abutment plates 62.

[0053] In S1, the prefabrication steps of the composite thermal insulation board 1 are as follows:

[0054] Place one of the push plates 62 and the embedded tube 61 fixed on the top on the reserved position of the bottom support plate 108, lay the first layer of alkali-resistant mesh cloth 103, spread the thermal insulation slurry 104, lay the second layer of alkali-resistant mesh cloth 105 and evenly press it into the thermal insulation slurry 104, alternately lay the thermal insulation core material 101 on the layer of thermal insulation slurry 104 to avoid the phenomenon of through seams, so that the embedded tube 61 is located between the joints 102 of the thermal insulation core material 101, install the upper bottom plate on the embedded tube 61, lay the third layer of alkali-resistant mesh cloth 106, spread the thermal insulation slurry 104, and evenly press the fourth layer of alkali-resistant mesh cloth 107 into the thermal insulation slurry 104. After the thermal insulation slurry 104 is formed, the push plate 62 and the boss 63 are hidden in the thermal insulation slurry 104, leaving only the tension bolt holes 102 in the embedded tube 61. During the spreading of the thermal insulation slurry 104 , the heights of the upper and lower layers of the thermal insulation slurry 104 are respectively 12.5 mm, and the height of the thermal insulation core material 101 is 15 mm. In this way, the overall thickness of the composite thermal insulation board 1 is controlled.

[0055] Among them, when laying the alkali-resistant mesh cloth, the alkali-resistant mesh cloth is opened and inserted into the corresponding embedded tube 61. When spreading the thermal insulation slurry 104, the embedded tube 61 is sealed to prevent the thermal insulation slurry 104 from entering the embedded tube 61 and causing blockage. When spreading the thermal insulation slurry 104, due to the fluidity of the thermal insulation slurry 104, the boss 63 can be partially covered inside it, so that the embedded perforated anti-folding part 6 is hidden inside the thermal insulation slurry 104, leaving only the tension bolt hole 102 in the embedded tube 61. The tension bolt hole 102 is convenient for subsequent construction and eliminates the step of on-site drilling.

[0056] Further, in S3, both ends of the non-disassembly tie rod 5 have external threaded sections, and the built-in card plate 7 includes a built-in cylinder 71 threadedly connected to one of the external threaded sections, and the outer end of the built-in cylinder 71 is fixedly connected to a support plate 72, and the support plate is placed outside the composite insulation board 1. The built-in card plate 7 is fixed by threaded connection, and after the built-in card plate 7 is fixed, the subsequent step of drilling holes and installing anchor bolts is avoided through the support plate, thereby avoiding secondary damage to the composite insulation board 1.

[0057] Further, in S3, the nut 8 includes a barrel 81, and the barrel 81 has an internal thread section that can be threadedly connected with the end of the non-disassembly tie rod 5. The outer end of the barrel 81 is fixed with a plug post 82, and the cross section of the plug post 82 is rectangular or hexagonal, so that a pin hole 83 is provided on the plug post 82. The clamping member 10 is sleeved on the nut 8 and the clamping member 10 is positioned by inserting a pin piece 12 into the pin hole 83. The pin piece 12 is in a triangular or right-angled triangle shape, and the cut edge has barbs. When the clamping member is sleeved on the plug post 82, the pin piece 12 is inserted into the pin hole 83. When the pin piece 12 is pressed by an external force, it is tightly inserted into the pin hole 83. During the insertion process, the pin piece 12 can also achieve a certain extrusion force on the clamping member 10, so that the two clamping members 10 are convenient for centering and clamping to further fix the square wood 9.

[0058] Among them, the built-in cylinder 71 and the cylinder body 81 are both truncated cone-shaped structures. The cylinder body 81 is threadedly connected with the non-disassembly tie rod 5 and fits into one of the built-in cylinders 71 to achieve further connection between the nut 8 and the non-disassembly tie rod 5 to avoid loosening.

[0059] Furthermore, in S3, the clamping member 10 includes a connecting portion, and arc-shaped arms are respectively connected to the upper and lower ends of the connecting portion. The transversely arranged square timbers 9 in the formwork support system are respectively placed in the two arc-shaped arms. The arc-shaped arms are used to prevent the inner wall formwork 4 or the composite insulation board 1 from being contacted and exerting pressure thereon while clamping the square timbers 9, thereby causing damage thereto. When the clamping member 10 is centered and clamped, there is a certain gap between the ends of the two arc-shaped arms and the inner wall formwork 4 or the composite insulation board 1.

[0060] During the dismantling process, since the plug post 82 in the nut 8 is rectangular or hexagonal, on the one hand, it prevents the clamping piece 10 from being inserted into the plug post 82 and causing problems such as unstable connection, and on the other hand, it is easy to screw the plug post 82 to remove it from the non-disassembly tie screw; after removal, the non-disassembly tie rod 5 is left inside the composite insulation board 1, which can avoid the hot and cold bridge effect and the stubborn problem of water seepage in the holes of the traditional tie nut 8, and then the transition layer and the finishing layer are constructed.

[0061] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. The construction process of composite wall with built-in tension bolts without dismantling the external formwork is characterized by: The following steps are involved: S1: prefabricated composite insulation board, during the prefabrication process, the composite insulation board is subjected to anti-bending treatment, and a number of groups of tension bolt holes are reserved after the composite insulation board is prefabricated; S2: Tie up the steel bar frame, erect the formed composite insulation board and inner wall formwork on both sides of the steel bar frame, and make holes on the inner wall formwork to match and align with the tension bolt holes; S3: inserting a plurality of groups of non-removable tie rods between the composite insulation board and the inner wall formwork, connecting one end of the non-removable tie rods located in the composite insulation board to the built-in clamping plate, connecting removable nuts at both ends of the non-removable tie rods, wherein one nut portion is placed between the non-removable tie rods and the built-in clamping plate, supporting a formwork support system on the outer sides of the composite insulation board and the inner wall formwork, sleeve clamping pieces on the two nuts, and then positioning the clamping pieces to achieve centering clamping; S4: pouring concrete between the composite insulation board and the inner wall formwork; S5: After the concrete is formed, the clamping parts, formwork support system, nuts and inner wall formwork are removed in sequence, and the non-removable tie rods and built-in card parts are left in the composite insulation board and the cast concrete.

2. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 1 is characterized in that: The composite thermal insulation board is composed of a plurality of thermal insulation core materials which are arranged in a staggered manner and spliced ​​together, with seams left between the thermal insulation core materials, and pre-buried perforated anti-bending parts arranged between the seams.

3. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 2 is characterized in that: The embedded perforated anti-bending part includes an embedded tube placed in the joint, the tension bolt hole is formed inside the embedded tube, both ends of the embedded tube are respectively connected to abutment plates, both sides of the abutment plates are respectively connected to bosses, and one of the abutment plates is detachably connected to the embedded tube.

4. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 3 is characterized in that: The prefabrication steps of the composite insulation board are as follows: Place one of the abutment plates and the embedded tube fixed on it on the reserved position of the low support plate, lay the first layer of alkali-resistant mesh cloth, spread the thermal insulation slurry, lay the second layer of alkali-resistant mesh cloth and press it evenly into the thermal insulation slurry, lay the thermal insulation core material on top of this layer of thermal insulation slurry in an alternating manner to avoid through-seam phenomenon, make the embedded tube located between the joints of the thermal insulation core material, install the upper base plate on the embedded tube, lay the third layer of alkali-resistant mesh cloth, spread the thermal insulation slurry, press the fourth layer of mesh cloth evenly into the thermal insulation slurry, and after the thermal insulation slurry is formed, hide the abutment plate and the boss inside the thermal insulation slurry, leaving only the tension bolt holes in the embedded tube.

5. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 4 is characterized in that: The heights of the upper and lower layers of insulation slurry of the insulation core material are 12.5 mm respectively, and the height of the insulation core material is 15 mm.

6. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 1 is characterized in that: In S3, both ends of the non-disassembly tie rod have external threaded sections, and the built-in clamping plate includes an internal cylinder threadedly connected to one of the external threaded sections, the outer end of the internal cylinder is fixedly connected to a support plate, and the support plate is placed on the outside of the composite insulation board.

7. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 6 is characterized in that: In S3, the nut includes a cylinder body, which has an internal thread section that can be threadedly connected to the end of the non-disassembly tie rod, and a plug column is fixed to the outer end of the cylinder, and a pin hole is opened on the plug column. The clamping piece is sleeved on the nut and the clamping piece is positioned by inserting a pin sheet into the pin hole.

8. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 7 is characterized in that: The inner tube and the cylinder body are both of truncated cone-shaped structure, and the cylinder body is threadedly connected with the non-disassembly tie rod and fits inside one of the inner tubes.

9. The construction process of composite wall with built-in tension bolts without dismantling external formwork according to claim 1 is characterized in that: In S3, the clamping member includes a connecting portion, and the upper and lower ends of the connecting portion are respectively connected to arc-shaped arms, and the transversely arranged formwork support systems are respectively placed in the two arc-shaped arms.

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